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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 16 |
| 4 | 64 |
| 5 | 508 |
| 6 | 4054 |
| 7 | 64383 |
| 8 | 1024957 |
| 9 | 32457661 |
| 10 | 1032121857 |
| 11 | 65351102113 |
| 12 | 4153964152453 |
| 13 | 525755086303623 |
| 14 | 66797889955402370 |
| 15 | 16898128960552112680 |
| 16 | 4291148950249485286442 |
| 17 | 2169726567052465643085463 |
[1,2,4,16,64,508,4054,64383,1024957,32457661, 1032121857,65351102113,4153964152453, 525755086303623,66797889955402370, 16898128960552112680,4291148950249485286442, 2169726567052465643085463] |